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Rok Mihevc updated ARROW-4596: ------------------------------ External issue URL: https://github.com/apache/arrow/issues/21137 > [Rust] [DataFusion] Implement COUNT aggregate function > ------------------------------------------------------ > > Key: ARROW-4596 > URL: https://issues.apache.org/jira/browse/ARROW-4596 > Project: Apache Arrow > Issue Type: Improvement > Components: Rust, Rust - DataFusion > Reporter: Andy Grove > Assignee: Luca Palmieri > Priority: Major > Labels: newbie, pull-request-available > Fix For: 0.14.0 > > Time Spent: 4h 20m > Remaining Estimate: 0h > > Add support for COUNT aggregate function. See SUM function in aggregates.rs > for inspiration. > SQL parser should support COUNT(1) and COUNT ( * ) syntax for counting rows > as well as COUNT(column_name) for counting non-null values for a column. > COUNT(DISTINCT expr) should be handled in a separate issue since it is more > complex. -- This message was sent by Atlassian Jira (v8.20.10#820010)